![]() we camped in a campground that warned of brown outs and the umbilical came loose from the truck once while pulling that could have done this but i would not think either really would have caused a fuse to blow. I also checked the two 30 amp fuses in the converter and they were good. It is model WF8845 input1 105-130vac, 60hz, 780 watts includes charging and load, power converter 70 vf. ![]() It turns out it is WFCO 45 amp power converter. i guess i was wondering if everyone had this "chicken scratch" on such important labels and if anyone else had this fuse blow for no reason too. On your recommendation I went out to check if it is a converter or invertor. it is interesting that removing this fuse will essentially isolate the battery from the converter (winterizing). wfco (the manufacturer of the unit) did not offer much on their site either. its the sole 20amp fuse just above the 40 amp which is not blown. i am assuming it is the output from the battery charge component of the converter. i can not find a suitable wiring diagram to tell me what this fuse is for and whoever marked it at the factory, well their penmanship could not be deciphered. As far as wiring, youll need to disconnect and reconnect 3 AC wires and 2 DC wires to hook up the new unit. If the converter output voltage at the battery reads in the 0. (the one right above the reverse polarity fuse). Installation is pretty straight forward, youll need to unscrew and disconnect the old converter. with no load, the converter is functioning properly. If the converter fuses and AC voltage are good, but the converter output still reads zero volts, the converter is not functioning properly. that put me into troubleshooting mode (what i do for a living) and soon found that the battery was fully charged and i had a blown fuse on the converter. we stayed the night with shore power attached then i checked again and still no battery power. although we had been out for a week just a week ago, i thought that the battery must be completely dead. I was getting ready to go to camp driveway Saturday night when i realized i had no battery power.
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